Frictional driving mechanism



Patented Jan. 1, 1889.

. UNITED STATES PATENT HENRY PARSOL OF MARLBOROUGH, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 395,507, dated January 1, 1889.

Application filed October 5, 1887- .To all whom, it may concern:

Be it known that I, HENRY PARSONS, of Marlborough, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Frictional Driving Mechanism, which will, in connection with the accompanying drawings, be hereinafter fully described, and specifically defined in the appended claims.

In said drawings, Figure 1 is a side elevation of a frictional driving mechanism embodying my invention. Fig. 2 is a top plan view of the mechanism shown in Fig. 1. Fig. 3 is a sectional elevation, the section being vertical and taken on line Z Z, Fig. 1, and the elevation as viewed from the right in that figure. .Fig. 4 is a sectional plan view, the section being horizontal and taken on line X, Fig. 1, and the plan showing parts below that line. Figs. 5 and 6 show modifications in the construction of parts of the machine.

My invention relates to that class of frictional devices which are employed for transmitting the motion of a main-line shaft to small machines arranged upon benches above such main line, the driving of sewing-machines in factories by such means being a familiar instance of power thus transmitted; and it consists in features of novelty hereinafter described and claimed.

Referring again to the drawin A represents a standard formed with base a, by which it may be firmly secured to the floor or other support. The upper portion of said standard is curved so as to overhang, and terminates in the tubular portion I). A lever, 13, havingits bifurcated portion curved upward, is pivoted to said standard by bolt 0, which passes through ears (I of the lever and part I) of the standard. The rear or horizontal portion of said lever terminates in a Eootplate or treadlebearing, C, on which the operator places a foot to depress the lever as a Ireadle. Said lever is habitually raised by helical sllring D, the lower end of which is hooked in the perforated boss (2 on the lever, while the upper end is attached to arm f, formed upon standard A, the spring being at all times in a state of tension, which is augmented when the lever is depressed by the operator. A short arbor, g, is supported in journal-bearing h, formed in Serial No. 251,492. (No model.)

Said arbor carries the band-wheel F and the friction-wheel E, which latter is formed with disks j, of leather or other suitable frictional material, compressed between disks 2, which are locked by splines or other means on said arbor g. A transmitting'pulley, G, mounted on and driven by the main-line shaft II, is arranged in such proximity to friction-wheel E that when lever B is depressed by the operators foot on plate 0 said wheel is forced against pulley G, when the rotary movement of shaft H will be transmitted to arbor g, and thence by the band on pulley F to the sewingmachine 011 the bench over it.

To instantaneously bring arbor g to a stop, a brake-shoe, k, is so arranged that when the foot of the operator releases said lever wheel E will by the action of spring D force the wheel against said shoe, thus stopping arbor g and its pulleys. Said shoe 7c is supported by its shank Z, which is seated in standard A, and is adjusted and locked in position by means of screw m.

In Figs. 5 and 6 the lever B is shown as formed to pass through standard A, instead of inclosing it by its forks, as in the other figures; but this change, as various othersin eluding self-oiling journal-boxes for arbor gthat could be made, I deem within the essential nature of my invention.

Simplicity, durability, prompt and easy action, effectiveness, and low cost are among the advantages possessed by my machine.

I claim as my invention-- 1. In a frictional driving mechanism, the combination of a standard formed and adapted to be secured in position, a curved lever pivoted to said standard and provided with a foot-plate by which to actuate it as a treadle, a friction-wheel and band-wheel secured upon an arbor journaled in said lever, so that as the lever is actuated by the operator the frictionwheel will be forced into contact with a transmitting-pulley on another shaft, a brakeduly arranged relatively to said friction-wheel, and a spring adapted to raise said lever and force said friction-wheel against said brake when the treadle is released from the foot of the operator.

2. The combination of stamflard A, upturned lever B, pivoted at its head to said standard, 4. In adriving' friction mechanism, the comarbor g, journaled in said lever below its pivbination' of a standard, a lever thereto pivoted oted head, the frictional and band Wheels seand adapted to be actuated as a lever, an ara cured on said arbor, and a foot-plate, C, 0n bor journaled in said treadle, and band and 5 the rear end of said lever, all substantially as K friction Wheels secured on said arbor, all sub- I 5 specified. stantially as specified.

3. The combination of standard A, curved HENRY PARSONS. lever B, arbor g, wheels E F, brake 7c, and I itnesses: spring D, all combined and arranged substan- ALEXANDER BERRY,

1o tially as specified. HARRY SPALDING. 

